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Nov. 20 1923.

L. S. KEILHOLTZ IGNITION SYSTEM Filed Aug. 10 1918 operation of the e Patented Nov. 20, 1923.

- UNITED a STATES PATENT OFFICE.

s. mom, or Darren. 01110; nssrcnon, BY MESNE assrcnmnn'rs, 'ro

DELOOrLIG-ET COMPANY, 0]? DAYTON,

euro, 11 coaronnrzon or DELAWARE.

remrroii sysrnn.

use I i lod August w, 1918. Serial 1a.; 249,219;

To all Beit knownthat I, Lies'rrn S.' Karrrxourz, a citizen of the United States-of America, residing at Dayton; county of Montgomery,

li'Stute of Ohio, have invented certain new {and useful Improvements" in Ignition 'Sys- ,tems,--of which the following is a. full, clear, and exact description. v

fThis'ihyention relates" to ignition systems 36finternalwombustionengines and the like, and has *among'its objects-the provision of improt'efiients in the i "sen stem de- 1scribed"and. claimed in re 'c'open ing applicatihn' of Charles F;-"' Kettering'; Serial N o. 15]2 i8-307- filed August 5, 1918, u h inire'ntioli described in the applica- "t'ioir referred to provides an; ignition system including elements,- a certain portion of which inc he brought into efiect to provide :0 ignition or'thecn'gine star-tin l-opleration; and'acertain other *portiono wr ich, in-

cluding oertainelemcnts of the first portion ofthe' system, may-behrought' into cfleot to provide ignition during the normal running 0;; The saidinvention includes ja maliu' yflope'rated device for renderingthe first port on inoperative and "the portion operativefor vice versa,

as desired,

N It'is an object ofthe present invention to providejin substitution for the manually controlleddevice, means controlled automatically accordance with the'speed of the en 'ne for renderin one portion of the 'operativelyassociated evioes inoperative, and for rendering the other ortion 'operafive, or vice versa, in accor ance with the operation of the engine.

Other and further bjects of the resent invention will be apparent from the ollowing description of a profcrred embodiment thereofirglfrerence being made to the accom- P y m -'--In'the'drawings:

'Fi 1 is ascctional view of-the ignition unit s own in 2 the section being taken on the line 1-1 of li'ig'. 2; and Fig. 2 is affront elevation of the lgmtion unit embodied in the present invention, touo'gcthcr with a wiring dia am and 2:. diagrammatic side elevation o certain arts of an inter'lial combustion engine to w 101'! the presentimiention is applied;

Referring to the drawin%s," des gnates the cylinderfo'f' an interna combust1on englue, in which reciprocates a piston 21, connected by means of the connectin rod 22 to a crank pin 23 carried by cranE shaft 24, which is moimted to rotate in bearings '25 and 26 whicl1 are suitably supported upon the engine frame, not shown. A enerator armature 30 is mounted on the sha 24, and cooperates with a generator field, not shown, for enerating an electric current'which is con noted from the'armature windings to a commutator 31, or to slip rings 32 and 33. Brushes 34 and 35 cooperate with the slip rings 32 and 33 to conduct current generated in the armature 30 to the primary transformer winding 36. A secondary" transformer winding 37 cooperatesfivith winding 36 to transform the current'to avoltage suitable for ignition purposes. Transformer winding 37 is connected by wires 38 and'eiO witha primary windin 4:1 of the ignition unit, to be described. inding 41 Soonnected by a wire 42 with an i nition' timer '43, connected by wire 14 'wit "the transformer winding 37. The circuitjust" 'described is a primary circuit of an ignition system using alternating current. It is obvious that current might-be supplied directly to this primary circuit from the commutator 31, if the voltage he suitable-for ignition purposes. The primary circuit may also be supplied with current from a battery or ot- 18! external source, but as is apparent, the primarycircuit may as well be energized by current supplied bythe generator driven by 3 the engine, thus making the use of an external source of current unnecessary; "A' secondary winding 45, which includes arelatively large number of turns of fine wire surrounds the primary winding 41, and is ounded at 46 and connected by wire 47 to t e spark plug 48.

50 designates as a whole,- the ignition unit which comprises a. supporting frame 51 which may be mounted upon the frame of the engine in any suitable manner. 'Mount- 100 ed upon the frame 51 are soft iron cores 53 and 54 upon which are laced the windings 41 and 45, which have can described; 55 and 56 are permanent magnets secured upon the cores 53 and 54 near then per ends 10:; thereof, said magnets 55 and 56 beingplaced with like poles adjacent. 57 and 58 are soft iron armatures which are slidably mo'untcd on the reduceds uared end ortions 59 and 60 resq'iectivclg 0 bar 61. he distance be- 110 '96, to be described. miner and a pivotally mounted latch 77 w tween the shoulders 63 and 64 fonmed on hair 61 by reducing the end portions thereof is less than the length of the cores 53 and 54.

Springs 65 and 66' are interposed between the armatnres' 57 and 58'respective1y, and washers 67 and 68, respectively, which are retained by means of pins 69 and 70, res ectively, which use through the be]: 61. aid sprin 65 and 66 serve to yieldingly mainmin t eminiatures-57 and58 in; engagement with thecor'es 53 and 54. The bar 61 is mounted to slide in a bearin 71 formed in the bracket 51,- and is provi ed with a dog 72. A reciprocating bar 73 is mounted to slide in the frame 51 and carries at its lower end a. roller 74; which, .coperates witha cam en 73 car-ties near its ich is yieldingly ur I by spring 78 toward the dog I2. The iiiiich 7.7 is provided with g1, ledge 79 which cooperates with the do 72 in a manner to be: described, and

sai latch 77 is provided with a. bevelled surfece-flQwhich; cooperates with the bevelled surface 8 1; formed-m the trip member- 82.

A- cover-83 isseoured ,to the frgme 51 and serves as a housingfon thedifierent parts l and provided with, a, cylindrical surface Q7 and a camming. sunface- 98, either surface QOIjGI'fltlngjVithroller 574, as will he g iesuii'illgo,1v 10931 96 is groyidedwith acollar 99 angleslot 100 thro which essesn 'pfinlQlq-figeed-in the sh 190g whic sen-res which carry. centrifugal weights lOaj; and a'zelforked-so as to engagethe eollanfisv A spring 106; connecting the levers 103 end 104 yielding-1y maintains the said levers in positionns-sih owni 1. V

A- weshnlm o; insulatin material is mounted on cam-96mm! is a. a. tedto-enge contact 1.08 oijgnitionswitch 39 and it-co. the same into engugement with contact i 95. I t 1 The-operation of the deY-ice'is as follows: When the engine iscrainked motion-will be transmittedfrom the crankZsha-ft 24; to the 96 through the gearing 92- and; 91. Thecam being'in position as shown in Fig. 1,1 will rotate and cause tliehar 7-3 to reciprocate irnthmfiame 51,, Agtlie bar=73 move upn'nirdly, as viewed Fig. 1,- the ledge 79 on the latch 77 will engage the dog 72 and in .meintnin the me iig withthe cam-fla. es ar-ldi'iving connection bet-weenr the shaft 'en E french 105w-i cause the bar 61 to move upwardly, U ward movement of the liar will bring I; e shoulder 6% into engagement with the arma- Hire 58, thus causing the immature 58 to move ewe from the-ends of the cores 53 and 54. uring this upward movement of the bar 61 the spring 65 will be com ressed and the itl'lllfllillte'fi? will be firm y held against the lower ends of the cores 53 and 54. Thus a com lete metallic magnetic circuitis estahlishe through magnets 55 and 56, core 53, armature 57 and core 54.

Further movement of the reciprocating bar 73 will cause the cumming surface 80 of the latch 77 to engage the surface 81 of the trip member 82; and as the upward movement of bar 73 continues, the latch 77 will release-the do .72 and will permit the bar 61 to move rapidly downward, by virtue of its own weight and the pressure stored in the spring 65. This downward movement of the her 61 will bring the armature 58 down into enga ement with the cores 53 and 54: and after t iis engagement has taken place the bar 61 will continueits movement by virtue of the momentum stored in it. The shoulde i' fiil willen the arnmture 57 and cause the mo vemen lfiiireof a short distance hwey fi-om the lower ends ofthe cores. 53 andh. When these movements of armatures- 58 andfil take place the magnetic fieldestablished through the cores 533116. 54 will be short circuitetl by the 'arnmture '58, end'the fluxchztnge will occui'nt a rate; V

suchns to create a sparking'impulse in the winding, 45' ofsufficient magnitude to cause a r tojum in the sp n-k plugv 48. A is interposed between the spring 84 whi lower end of; aslot in bar 73 and the pin- -85 mounted in.

to 1 turn lowest sition and i to. yieldroll?! (3 in; adengage- 108 into en ment' with contact 109 ,The timer 43 no then be; effective to make end break the primary cigeuit, described, and to render thecoil 41 effective electro-mngneticall tocreate sparking impulses in the win in 45: 1

be apparent from the foregoing descrlptlon that the recipnocnthig bar- 73 und its associated moving parts provides a mechanical means for intermittently creating and destroying a magnetic field in the inc ios

engagement with. contact 108, and contact."

- 1,e74,7so

region of the secondary winding or inductive circuit 45, and; likewise, t e prima circuit thro h the timer 4:3 and the win ing 41 provi cs an electrical means adopted 5 to acoom lish thesame result. It will be vobserved rther that. the mechanical means is rendered inoperative b the mechanical action of the .speed-contro led means in ar- An ignition system embodying the present invention posseses the advantages of an impulse generator ignition system for supplyin ignition at low engine speed and has t is 'ad vantages of a silent-operating battery type system without thc'disadvantage of providmgaa scporate storage battery or otheri source 1 of current independent of the 7 wengine. This invention posseses a further madvantag'c' sin" that the impulse generator featuremi the system becomes automatically -inoperative after the engine becomes self-operative' and no further act is required to place the battery-type systeminto operation.. It will be understood that instead of the centrifugal device herein: disclosed an elecj trical or other equivalent means ma em.-

ployedfor-movingthe cam 96-t0 t e on or ail sition herein described. 1

liile the form of mechanism herein shown anddescribod constitutes a preferred form of embodiment of the invention, it is to be- 121168185006. that other forms might be adopted,- alr doming' within the scope of the claims which follow.

-What I claim is-as follows:

1. In combination with an internal-combustion engine, an ignition system comprising an inductive circuit; means providing a magnetic path linked with the circuit; elec- 46 trical and mechanical means for intermittently creating and destroying a magnetic field in the r ion of said inductive circuit whereby to in uce e sparking impulse therein, said electrical means comprising an elec- 0 tries]. circuit and said mechanical means comprising a movable member for continually varying the reluctance of said magnetic path; and means responsive to an operating condition of the engine for rendering either of the first-mentioned means ino rative, said lastmentioned means inclu provisions for arresting the movement 0 said movable member.

2. In combination with an internal-combustion engine, an ignition system comprising an inductive circuit; means providin a magnetic ath linked with the circuit; e ectrical ancFmechenical means for intermittently creating and destroying a magnetic no field in the region of said inductive cn'cuit .short-circuiting means inoperative an the region of the win ing; means for shortwhereby to induce a sparking impulse therer in, said electrical means com )rising an electrical circuit and said mec ianical means comprising a. movable member for continually varying the reluctance of saidmagnetic path; and means responsive to an operating condition of the engine for rendering either ofthe first-mentioned means ino ,erative, said last-mentioned means inclu in provisionsiior' arresting theunovement 0 :16 said movable member and for rendering said electrical circuit inoperative.

3. In combination with an internal-combustion engine, an ignition system comprising an inductive circuit; a source of mag-.; netism; a core cooperating with the inductive circuit for conducting and concentrating magnetism from the said source in the '-region of said circuit; a-second inductive circuit cooperating electro-magnetically with; the core andfirst named inductive circuit; a source of currentand an. ignition timer adapted to be connected with the second inductive rcircuit; Emeans -fori mechanically -shortc1rcu t1ng the source of magnetism and means dependent .onthe operation '0 the engine, for 1 automatically rendering thc ,for connectingthe second named inductivecircult with the timer and current squrce vo whereby a sparking impulse maybe created electro-magnetically in the tfirst: inductive circuit.

4. In combination with an internal-combustion engine, an ignition system comprisw ing an inductive winding and a. permanent magnet; in core cooperatin with the winding. for conducting an concentrating magnetism from the ermanent magnet in ms circuitmg the permanent magnet from the core; an ignition timer; a source of current; a second inductive windin arranged to cooperate with the first name inductive winding; and means dependent on the operation of the engine for renderin the short-circuiting means inoperative and for bringing the second named inductive windin into operation whereby to create a sparking impulse in the first named inductive winding.

5. In combination with an internal combustion engine, an ignition system comprising an inductive winding; a permanent ma ct; cores cooperating therewith and wit the winding for conducting magnetism from the permanent magnet to the region of the winding; a movable armature cooperating with the cores for completing the magnetic circuit through the cores; a second movable armature for short-circuiting the magnetism of the permanent magnet away from the cores; :1 second inductive a source of current adapted to be connected iso ing member actuating the armatures first to complete themagnetic circuit through the cores and then to short-circuit ma n'etism away from the cores; and means dependent on the operation of the engine for rendering the reciprocating member inoperlitive and for connecting the second inductive winding with the'timi' and source of current whereby asparking impulse may be created in the first named inductive winding.

(5.- In combination with an internal-combustion engine, an ignition system comprising a plurality of elements, a certain portion of which may be cooperatively associated to provide ignition to be used: before the engine becomes selfopera-tive said por tion including means for providing a: magnetic path of high permeability and a movable member for continually varying the reluct'ance thereof, and a. certain portion of which may be cooperatively associated to provide suitable ignition for the engine running said second portion including certain elements of the first portion; and means responsive to an operating condition of the engine for rendering either of said portions operative sa-i'd last-mentioned means includmg provisions for arresting the movement of said movable member. i

7. In combination with an internal-combustlon on he, an ignition system comprising'a n' int uctive circuit; a. magnetic path through the circuit; electrical means for intermittently creating and destroying a magnetic field in the region of said circuit, said means including a. timer, asource of current and a second inductivecircuit; a switeli contfolli'ng'the operation of said-electrical means; mechanical means for intermittently creating and destroying a. magnetic field in the region of said'circuit including a permanent magnet and a reciprocating member arranged to cause flux fromthe magnet to pass intermittently through said magnetic path; an engine driven shaft carrying a cam for operating said timer; a

cam for operating said reciprocating memtioned cam out of operative relation with" the reciprocating member and into a position for closing said switch whereby to render said electrical means operative and said mechanical means inoperative.

b. In combination with an internal-combustion engine; an ignition system therefor comprising an inductive'circuit; means comprising a ma net and a movable member for periodical l varying the magnetic .flux density in the region of the inductive circuit whereby to induce a sparking impulse therein; means'coinprising a: second inductive circuit for also varying the said magnet'ic flux density; and means responsive to an opera-tin rondition of the engine for rendering. either of the first mentioned inoperative; said last-mentioned means including provisions for arresting the movement of said movablemember.

In testimony whereof I aflix my signa-- ture.

LESTER KEI-LHOLTZ.

Witnesses: i

J. W, MfiDONAL-B, M. A. 

